O experimento teve como objetivo o desenvolvimento de uma bucha de bronze ao alumínio de alta dureza através do processo de metalurgia do pó e endurecimento por precipitação. Iniciou-se pela definição da liga de bronze equivalente que atingiria os resultados obtidos pelo processo de fundição, ou seja, dureza final acima de 190 HB. Foram elaboradas ligas por metalurgia do pó com cobre como base e alumínio, sendo que a utilizada no processo de fundição não apresentou bons resultados na adaptação para a sinterização. Foram realizados ensaios de compactação visando a maior densidade à verde possível para as respectivas ligas. A sinterização das peças foi feita à temperatura de 885ºC em atmosfera de nitrogênio e hidrogênio até a obtenção de peças com maior resistência e menor variação dimensional. Um fator importante observado foi que o acréscimo de lubrificante na mistura prejudicou a sinterização das peças, resultando em peças com baixa resistência mecânica. Dentre as ligas de bronze estudadas, a que apresentou melhor resistência mecânica e menor variação dimensional foi a liga 81Cu - 11Al - 4Fe - 4Ni. Após a sinterização, realizou-se de ensaios de solubilização com temperaturas próximas do ponto de fusão da liga e sem atmosfera. Verificou-se que houve um crescimento máximo da dureza para a temperatura de 670 ºC, havendo decréscimo após esta temperatura. Posteriormente, as peças que sofreram maior endurecimento resultante da solubilização foram submetidas à precipitação por envelhecimento artificial. Os resultados obtidos após o envelhecimento comprovaram que houve a formação dos precipitados endurecedores e o tratamento térmico do bronze ao alumínio atingiu resultados satisfatórios em relação aos parâmetros especificados. Foram obtidas durezas acima de 150 HB. / The experiment had the development of the aluminum bronze bush with high hardness by the metal powder process and precipitation hardening as target. The development was begun by the definition of the bronze alloy which would reach the results of the casting process, hardness up to 190 HB. Different alloys were prepared by powder metallurgy, and the alloy used in the casting process did not have success in adapting to the sintering. The compaction tests were carried out seeking the highest green density for the respective alloys. The sintering of the parts was done at 885ºC and nitrogen/hydrogen atmosphere to obtain the product with greater resistance and less dimensional variation. An important factor observed was that the addition of lubricant damaged the sintering of the parts, resulting in low mechanical strength. Among the bronze alloys studied, the 81Cu - 11Al - 4Fe - 4Ni alloy was chosen by having the best mechanical strength and less dimensional change. After sintering, the solution heat treatment was performed at temperatures near of the alloy’s melting point and no atmosphere. It was found that there was a maximum increase of the hardness at 670ºC, decreasing after this range. Subsequently, the samples which suffered further hardening results from the solution heat treatment were submitted to precipitation heat treatment. The results showed that after the precipitation heat treatment the hardening precipitates were created and the heat treatment of aluminum bronze reached satisfactory results for the specified parameters. Hardness over 150 HB were obtained.

Ce travail s’est intéressé à la dynamique de peuplement du sud de la Sibérie et de l’Altaï à l’âge du Bronze (IIIème - Ier millénaire avant J.-C), période pendant laquelle les steppes eurasiennes auraient connues de nombreux mouvements de populations. Les analyses moléculaires ont portés sur 69 spécimens anciens. La stratégie adoptée a consisté, en plus de l’étude de l’ADN mitochondrial, à étudier les lignées paternelles de ces individus, ainsi que des marqueurs autosomaux, informatifs de leur origine biogéographique (AIM) et des caractères pigmentaires. L’ensemble des données moléculaires obtenues nous a permis de mettre en évidence une évolution du pool génique au sein de la région étudiée. Le faible effectif observé par groupe culturel ainsi que le processus de recrutement funéraire peut avoir biaisé une partie des analyses. Néanmoins, ces données moléculaires ont amené de nouveaux éléments pour la compréhension du peuplement de cette région qui apparaît comme un processus complexe. / The present work has focused on the settlement of the South Siberia and the Altai mountains during the Bronze Age (III-I millennium BC), period during which the Eurasian Steppes knew a lot of population movements. The molecular analyses were performed on 69 ancient samples. The used strategy consisted in the study of maternal and paternal lineages and autosomal markers informative of biogeographical ancestry (AIM) and physical appearance. Taken together, these results show an evolution of the genetic pool in this area during the Bronze Age. The low effective observed in each cultural group and the funeral recruitment could of course have induced a bias in some analyses. Nevertheless, these molecular data gave new elements to understand the settlement of this region which seems to be a complex process that it will be necessary to deepen with new paleogenetic even paleogenomic studies.

Através da pesquisa dos elementos verticais, presentes na maioria dos edifícios da cidade de Mália do período palacial (2300-1480 a.C.), temos como objetivo nesta dissertação de mestrado analisar a organização tridimensional das construções, tanto as privadas como as públicas. A investigação inicialmente parte das noções do conhecimento de todas propriedades e características desses mega-artefatos, os edifícios. Em seguida, busca identificar padrões e regularidades, analisando os materiais, as técnicas e as disposições das escadarias inseridas nas construções, para assim poder compreender o papel do elemento vertical na percepção do espaço entre os minóicos, a tridimensionalidade de seus edifícios, suas restrições e possíveis reestruturações de funções, pois o que restou dessas construções são apenas as rotas horizontais. Tenta-se identificar as concepções que levaram seus usuários a optar por verticalizar suas cidades. Esta pesquisa revela que os elementos verticais são essencias na paisagem em relação aos aspectos espaciais construídos; definem edifícios que se destacam e modificam o território onde viviam os minóicos. / Through the research of vertical elements, which are prevalent throughout the majority of the buildings in the palatial city of Malia (2300-1480 a.C.), we aim to analyze the spatial organization of tri-dimensional constructions, in both private and public buildings. The investigation is initially based on the notions of the knowledge of all the properties and characteristics of those mega-artefacts, the buildings. Then, identify patterns and regularities, analyzing the material, the techniques, and the layout of staircases built into the constructions, as to achieve a deeper understanding of the role the vertical element played in the perception of space among the minoans, their tridimensionality techniques, the restrictions and the possibility of restructuring functions, since what is left of the constructions is only the floor plan. We attempt to identify the conceptions that led the users to choose to make their cities vertical. This research shows how essential the vertical elements are in the landscape when built spacial aspects are concerned; they define buildings which stand out and modify the territories where the minoans lived.

O experimento teve como objetivo o desenvolvimento de uma bucha de bronze ao alumínio de alta dureza através do processo de metalurgia do pó e endurecimento por precipitação. Iniciou-se pela definição da liga de bronze equivalente que atingiria os resultados obtidos pelo processo de fundição, ou seja, dureza final acima de 190 HB. Foram elaboradas ligas por metalurgia do pó com cobre como base e alumínio, sendo que a utilizada no processo de fundição não apresentou bons resultados na adaptação para a sinterização. Foram realizados ensaios de compactação visando a maior densidade à verde possível para as respectivas ligas. A sinterização das peças foi feita à temperatura de 885ºC em atmosfera de nitrogênio e hidrogênio até a obtenção de peças com maior resistência e menor variação dimensional. Um fator importante observado foi que o acréscimo de lubrificante na mistura prejudicou a sinterização das peças, resultando em peças com baixa resistência mecânica. Dentre as ligas de bronze estudadas, a que apresentou melhor resistência mecânica e menor variação dimensional foi a liga 81Cu - 11Al - 4Fe - 4Ni. Após a sinterização, realizou-se de ensaios de solubilização com temperaturas próximas do ponto de fusão da liga e sem atmosfera. Verificou-se que houve um crescimento máximo da dureza para a temperatura de 670 ºC, havendo decréscimo após esta temperatura. Posteriormente, as peças que sofreram maior endurecimento resultante da solubilização foram submetidas à precipitação por envelhecimento artificial. Os resultados obtidos após o envelhecimento comprovaram que houve a formação dos precipitados endurecedores e o tratamento térmico do bronze ao alumínio atingiu resultados satisfatórios em relação aos parâmetros especificados. Foram obtidas durezas acima de 150 HB. / The experiment had the development of the aluminum bronze bush with high hardness by the metal powder process and precipitation hardening as target. The development was begun by the definition of the bronze alloy which would reach the results of the casting process, hardness up to 190 HB. Different alloys were prepared by powder metallurgy, and the alloy used in the casting process did not have success in adapting to the sintering. The compaction tests were carried out seeking the highest green density for the respective alloys. The sintering of the parts was done at 885ºC and nitrogen/hydrogen atmosphere to obtain the product with greater resistance and less dimensional variation. An important factor observed was that the addition of lubricant damaged the sintering of the parts, resulting in low mechanical strength. Among the bronze alloys studied, the 81Cu - 11Al - 4Fe - 4Ni alloy was chosen by having the best mechanical strength and less dimensional change. After sintering, the solution heat treatment was performed at temperatures near of the alloy’s melting point and no atmosphere. It was found that there was a maximum increase of the hardness at 670ºC, decreasing after this range. Subsequently, the samples which suffered further hardening results from the solution heat treatment were submitted to precipitation heat treatment. The results showed that after the precipitation heat treatment the hardening precipitates were created and the heat treatment of aluminum bronze reached satisfactory results for the specified parameters. Hardness over 150 HB were obtained.

A Ilíada de Homero é geralmente caracterizada como um poema que trata da Guerra de Tróia, que teria acontecido mais de 500 anos antes da composição de tal poema, e teria sido transmitido através da tradição oral, até o momento em que foi escrito pela primeira vez. Esperava-se, portanto, que os fatos narrados pelo poeta correspondessem aos achados arqueológicos encontrados para o Período Micênico, mas o que se encontra na Ilíada é uma mistura de elementos da sociedade micênica e da sociedade contemporânea a Homero, ou seja, o século VIII a.C. O estudo da relação entre documentos arqueológicos dos períodos Micênico, Proto-Geométrico e Geométrico, compreendidos entre 1550 e o final do século VIII a.C., e a Ilíada de Homero é composto por duas categorias de fontes distintas, a arqueológica e a escrita, esta como resultado de uma tradição oral que a precedeu. A presente dissertação tem como foco apresentar as informações que se podem depreender da Ilíada de Homero que, de alguma forma, contribuíram para a interpretação arqueológica e se, de tal confronto, surgiram controvérsias entre os dois tipos de fontes, levando a uma reflexão sobre a questão da continuidade e da ruptura de elementos culturais próprios da Civilização Micênica e que, de certa maneira, se refletem nos períodos posteriores em pauta. / The Iliad of Homer is generally seen as a poem about the Trojan War, which took place more than 500 years before the composition of such poem, and transmitted by oral tradition down to the moment it was written for the first time. It was hoped, therefore, that the facts narrated by its poet matched the archaeological finds for the Mycenaean Period; instead what is found in the Iliad is an ensemble of the elements of the Mycenaean society and the one contemporary to Homer, which is considered to be the eighth century B.C. The study of the relation between the Mycenaean, Proto-Geometrical, and Geometrical archaeological finds, dating from 1550 to the end of the eighth century B.C., and the Iliad of Homer is based on two different categories of sources, namely the archaeological and the literary ones, the last one being the result of an oral tradition which had preceded it. The present dissertation focuses on showing the information that can be derived from the Iliad of Homer that somehow has contributed to the archaeological interpretation and whether controversies were raised between those two kinds of sources from such a comparison, leading to a reflection about the question of either continuity or rupture of the cultural elements proper to the Mycenaean Civilization and that, in a certain way, are reflected on the later periods concerned.

Active pendant près d’un millénaire, la métallurgie du bronze khmère se distingue par une remarquable continuité et par la production aussi bien d’images sacrées que d’objets les plus divers et le plus souvent cultuels. Cette tradition métallurgique sera appréhendée dans le cadre de notre thèse à travers l’analyse d’une période de production spécifique comprise entre la fin du XIe et le début du XIIIe siècle, celle-ci ayant l’intérêt d’avoir fourni la plupart des vestiges en bronze jusqu’ici conservés. Sans négliger les approches "classiques" généralement retenues pour étudier les bronzes khmers, ce travail aura pour principal objectif de caractériser les savoir-faire techniques alors maîtrisés par les bronziers angkoriens. Après un nécessaire ancrage historique au sein d’un royaume khmer dominé par la dynastie de Mahīdharapura et par plusieurs grands centres politico-religieux dont Yaśodharapura / Angkor, la production étudiée sera présentée dans ses grandes lignes sous deux angles complémentaires, typologique et fonctionnel. L’épigraphie khmère sera ensuite sollicitée afin de fournir des premiers éléments quant aux pratiques et aux savoirs métallurgiques attestés au cours de l’époque angkorienne, à la fois pour le bronze, ou saṃrit en vieux khmer, et pour d’autres métaux. Un corpus raisonné de 167 statues et objets en bronze, issus de plusieurs collections muséales et soumis à diverses techniques d’examen et d’analyse, aidera enfin à reconstruire les séquences de travail de la chaîne opératoire présidant à la réalisation d’un bronze. Parmi celles-ci, les pratiques de fonte, bien documentées grâce aux résultats apportés par de récentes analyses élémentaires, feront l’objet d’un développement particulier. / Active for almost a millennium, Khmer bronze metallurgy is characterized by a remarkable continuity and by the production of sacred images as well as of objects of the most varied kind, but usually for ritual practices. This metallurgical tradition will be considered in the framework of our thesis through the analysis of a specific period of production that lies between the late eleventh and early thirteenth century, the latter having the advantage of providing the most numerous bronze remains conserved thus far. Without neglecting the "classical" approaches generally used to study Khmer bronzes, this work will serve primarily to characterize the technical know-how then mastered by Angkorian bronze craftsmen. After a necessary anchorage in history in a Khmer kingdom dominated by the Mahīdharapura dynasty and several major political and religious centers including Yaśodharapura / Angkor, the studied production will be presented in two complementary perspectives, typological and functional. Khmer epigraphy will then be solicited to provide the first elements on metallurgical knowledge and practices attested during the Angkorian period, both for bronze, or saṃrit in Old Khmer, as well as for other metals. An annotated corpus of 167 images and objects in bronze, from several museum collections and subject to various technical examinations and analyses, will finally aid in rebuilding the workflows of the chaîne opératoire governing the production of a bronze. Among these, foundry practices, well-documented by the results provided by recent elemental analyses, will be the object of deeper study.

AJ The work is paid to the study of the Bronze Age in the territory of Cambodia. This period is dated from the year 4000. Study of the Bronze Age in Cambodia, located in the lowlands in Southeast Asia, has long been influenced by the fact that the country was in the years 1865 - 1953 French colony. And yet they were the first archaeological excavations of prehistoric loklait made in Cambodia earlier than in other countries in East and Southeast Asia. Representative of the French protectorate in Cambodia Lieutenant Jean Moura, led by a focus on prehistoric monuments, won the research in 1864, stone tools at the site near the river Samrong Sen Chinita. The findings were later moved to study in France. Samrong Sen and the location was again examined in the years 1878-1879. This was practically initiated the study of the Bronze Age in Cambodia. The present study deals with a detailed description of the geography of Cambodia, the composition of the population, society, religion and language peculiarities. The basis of the work is characteristic of the major archaeological sites of the Bronze Age, classifications and technical analysis finds of bronze objects. The work can be seen as a first overview study of the Bronze Age in the territory of Cambodia.

Metal-insulator transition is one of the most important properties observed in certain materials which has been studied widely using a wide range of experimental techniques as well as theoretical models. This kind of a transition, observed in several systems, can take place by tuning several parameters such as pressure, temperature or the composition itself. In this thesis we study a few selected transition metal oxide bronzes exhibiting such phenomenon, each of which has a different cause for undergoing the transition. In Chapter 1, we discuss briefly several mechanisms and models that have been used to understand metal-insulator transitions. We also briefly discuss the role of disorder, electron-electron correlations or both to understand the different ways in which such transitions can occur. In Chapter 2, we describe the different experimental as well as theoretical techniques that have been used in this thesis. In Chapter 3, we study the fermi-edge of the NaxWO3 systems, as a function of x, to understand the origin of the metal-insulator transition occurring in this series of compounds. The system undergoes a metal-insulator transition at the critical composition xc=0.25, below which it is found to be insulating. At the lowest temperature, the very low x compounds behave as disordered and correlated materials. Above the transition composition, the compounds behave as disordered and correlated metals. In the insulating regime, close to the critical composition, we find that the system behaves in a way that cannot be described by any known theories for metals or insulators. We have also done a systematic analysis of the Fermi-edge data for the insulating samples as a function of temperature and we find that they cannot be described by any of the known theories for solid-state systems. Further development is necessary in the theoretical side to understand and interpret our data. In Chapter 4, we study the angle-resolved photoemission data for the highly metallic sodium tungsten bronze Na0.8WO3. We have synthesized the single-crystals by high-temperature electrochemical synthesis and we have performed angle-resolved photoemission experiments to understand the band structure of this system. The experimental results have been supported by theoretical calculations. We find that the rigid band model is valid in describing the electronic structure in these systems. We also find the existence of electron-like pockets along certain symmetry directions. Further, photon energy dependent studies on the x=0.8 sample suggest that there is a difference in the surface with the bulk of the sample. The bulk is perfectly periodic and ordered, whereas the surface shows a distortion due to the rotation or deformation of the WO6 octahedra. In Chapter 5, we have studied the electronic structure of the low dimensional molybdenum oxide La2Mo2O7, which is expected to have a charge density wave(CDW)driven metal-insulator transition around 125K. We indeed observed the presence of CDWs in this system, which was observed in the angle-resolved photoemission spectra as back-folding of bands below the transition temperature. We have also studied the temperature evolution of the bands close to the Fermi level and we see a gradually weakening and finally disappearance of the back-folded bands close to and above the transition temperature. We have studied the angle-integrated spectra of this system from which we conclude that La2Mo2O7 is a CDW non-Fermi liquid system. We have also evaluated the total and partial density of states in this system using Vienna ab-initio simulation package. We find the results consistent with our experimental findings. In Chapter 6, we study the metal-insulator transition in another low-dimensional molybdenum oxide KMo4O6, which is expected to show a metal-insulator transition around 120K due to the formation of spin-density waves. We observed back-folding of bands with lower intensities at low temperature, suggesting the formation of spin density waves in the system. The angle-integrated spectra suggested that the system is a non-CDW non-Fermi liquid system. We have also evaluated the density of states and the results are in agreement with our experimental findings. In conclusion we have investigated the electronic structure of different classes of systems and we have given clue to the origin of the metal-insulator transition in these systems.

The smiting pose is a motif used by the Egyptians, Minoans, and the Mycenaeans during the Bronze Age (ca. 3000–1200 BCE). Although the smiting pose has been identified as an emblem of the pharaonic office, the pose has never been investigated in the field of Aegean prehistory. This motif is incorporated as evidence when discussing larger topics, such as warriors and warfare of the Aegean during the Late Bronze Age. In these arguments, art-bearing iconography is used as evidence to support the presence of martial Minoans and are only ever mentioned as such. This dissertation investigates the smiting scenes from the Egypt and Crete and the Mainland of Greece and examines them to answer the following questions: how people are creating and expressing power in the Eastern Mediterranean and how do trade networks influence this. The first part of this approach considers different trade routes explored by Crete and the Mainland as well as the role the Aegean peoples played in the international trade networks. The second part of this study focuses on the smiting motif in its regional context to explore how power was constructed and represented through violence to fit their concepts of ruling and kingship. / Art History

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